Hinge construction



Aug. 9, 1932. G. BOMMER HINGE CONSTRUCTION Filed June 11. 1951 INVENTOR. fizzstav Hammer Patented 9, 1932 UNITED srA'r-s GUSTAV LBOMMER, or BROOKLYN, NEW YORK, Assreuon'ronmrr. Born/reaps BROOKLYN,

NEW YORK HINGE CONSTRUCTION Application filed. June 11,

This invention relates to an improved construction for door hinges, its object being to provide a very simpleand desirable methed and structure by which directly and in a rigid and unyielding manner to secure the axial pivot shaft of the-hinge to the sup-v porting bracket which is attached to the door frame. V

i In hinges of the type in which the hinge casing, which contains'the tortional acting spring, turns upon the pivot shaft and w th the bracket attached to the door, great difficulty is experienced in obtaining such a secure connection between the pivot shaft and the supporting bracket on the door jamb that the pivot shaft will not in time, under-the turning of the door and hinge casing, workloose and yield in a' circular direction, with the result, amongst other undesirable features which follow from such relative yielding, that the doorgets out ofv alignment with the door jamb. 7 7 i v;

The purpose and object'of the present invention are to provide a simple and practical construction by means of whieh, when the pivot shaft andiits support are oncesecured directly together, they will remain secured together in a rigid, unyielding conditlon, although the parts can be separated if an occasion should aroserequiring their separation; V

The features of the invention willbe more fully described hereinafter and finally claimed. One simple and. practicalexample of the invention, as'reduce'd to practice, isshown in the accompanying drawing, in which:'- v r Figure 1 is an elevation and partial "section of my improved spring hinge embodying the features of the invention formingthe basis of'this present application,"

i Fig. 2' represents a fragmentary: sectional "view on a larger scale, taken on the line 2 2 ofFig.1; V to Fig. 3 is an elevational view, showing the parts separated but in proper aligned order for assembly; 1 v

Fig. e is an enlarged fragmentary sec; tional detail, illustrating the relation which an axially extending tooth on the pivotshaft "1931. Serial No. 543,579.

bears to the socket wall to be penetrated thereby; and Y i Fig. 5 is a fragmentary section on an enlarged scale,.showing the axial teeth asfthey appearwhen wedged into the wall of the 55,

socket. Referring now tothe parts shown in the accompanying drawing, 10 denotes an angu lar'bracket for attachment to a door frame or jarnband the vertical portion of this 60 bracket is provided withthe usual apertures 11 adapted to receive screws or thelike whereby, to be secured to the frame or amb. 12 designates a horizontal bracket for. at

tachment t0 the lower edge of the door and 6 this bracket is provided with'apertures 13 i for receiving the attaching screws or the like. Fixed to one end of thebracket 12 is a cylindrical casing 14 in which is centrally positioned a cylindrical pivot shaft 15,.the 9 upper. end of'the shaft being applied to a seat or bearing portion 16 provided for the purpose in the top of the casing and the lower portion of the shaft fitting in an opening or bearing provided by an annular flange 7 17 depending from the detachable; bottom plate 18 of the casing. Disposed on the shaft within the'casingare suitable. upper andlower plates l9gand 20, suitably holed for the passage of the shaft; and'encircling $0 the shaft between these two plates is a helical spring 21 theopposite ends'of' which are attached to the respectiveupper. and lower plat-es. These plates are provided in wellknown mannerwith-projecting shoulders .22 5 which engage with suitable ribs or lugs provided on the inside of the casing The cylindrical pivot shaft, in order to provide forits' securement' to the horizontal portion or body 2 1 ofthe bracket 10, extends a considerable distancebelow the lower edge of the annular bearing flange 17-. Its spe- I cial construction includes a reduced intermediate portion .25.which is. separated by an annular shoulderQG from a larger po'rtion 27 that constitutes as to its diameter'a uniform continuationof the main ,cylindricalshaft,

it being noted inthis regard that the'portion 27 extends a distancev belowv the lower edge of the collar or bearing. 17 before the 11.09

i in the upper portion ofthe body 24 there isprovided a circularly-expanded seat inopen communication with the bore and concentric therewith. This seat 30 is. ofa'di' ameter in some degree less than the diameter of the shaft portion 27. These parts-are so proportioned and arranged that when the shaft is inserted with its intermediate part 25 engaging the wall of the bore 29, the

v screw-threaded" en'd'28 will protrude well below the underneath; face of the body 24;, for thereception 'ofa securing nut 31.

According to an important feature "of the present: invent1on,the "circumference of the portion 27 below theflange'17'and cont1gu ous with the annular collar 26" is cut all" around to provide cutting teeth 32'which e::

ten'd' parallel with the axis of the pivot;

shaft; and by preference the annular corner between the shoulder 26 and circumfer enceiof the portion 27 is so made that the teeth, when out, will extend v somewhat bel'owthe' plane of "sai'd'a'nnular shoulder26,' I as best shown in Fig; 2. Under'this arrangement, when the pivot. shaft is inserted in the bore and" forcibly moved axially'.down wardl'y therein the cutting teeth '32 out into, and form-their own seats 33in, th'e'body of the horizontal portion 24 1 surrounding the seat 30. To better 'enablethe cutting operati-on and the formation ofthe seats 33-by the cutting teeth 32, the latter are hardened,

V preferablyby the well-knowncyanidehard ening process. By turning the applied nut ght-1 against the und'erface of the body 24'," the pivot shaft will be drawn axially downwardly, theteeth 32 cuttingfor themselves the seats 33 as" they are drawn downwardlythrough the material of the bod-v24.

The pivot shaftma y thus be drawn axially downwardly until the cutting teeth 32- are drawn into the material off-the bodyv forthe distance necessary to make a rigidiand'gunyielding connection directly between the pivot shaft and the material of the body.

the cutting teeth 32 cut'the seats'33'the material portions 34 integral with the body 24: and which come between the teeth 32 as shown in Fig." 5, are wedged firmly between V the teeth'and interlocktherewith so as to positively prevent anyficirc ular yielding of the cylindrical pivotishaft with'respect to the supporting bracket.

In hanging the door, the cylindrical pivot V shaft is inserted in the bore of the supporting bracket, and the cutting teeth 32 are initially interlocked with'the material thereof downwardly through and well in that position inwhic'h the door fastened,

of; the body 24, naturally prevents the shaft from working axially upwardly for any re lease of the 'c'uttin'geteeth from their seats in thematerial of the body. Itis in placeto note here that the firm and" unyieldingcon nection" which is provided'by my present invention entirely e'liminates theuse of'washers and similar means which are commonly used in the attempt to'se'curea rigid binding con nection; and it will be further observed; that in the present inventionthe cuttingteeth' provide a direct wedging and interlocking con nection between the cylindrical pivot'shaft and the body of the supporting bracket. .VVhile by way of example, I have h'ereini-l lustrated and described my improvements in connection with a pivot type'hinge embodying a. spring, it is to be understood 'f that in v practice my improvements may be" employed w th equal advantage and effect in' connection with pivot hinges of types other than that herein shown wh'ether embodying a' spring orotherwise, f 7 It is to be understood thatin the practice of my 1nvention,-I reserve the right and privilege of resorting to all such legitimate changes: and modifications in the form,Ic'onstruction, and relative arrangement of the various parts as may be fairly incorporated in the spirit and scope of the invention as claimed. is V I claim.:

1 V 1.: In a door hingeof the kind described,

the combination of'a fixture adapted to en'- gage thedoor and formed with .a cylindrical casing, a bracket for mounting the fixture on a door" jam'b, said bracket includingfa horizontal part having a vertical opening of cylindrical form extending thereth'rough ,1 a vertical p vot shaft on" which the casing-is centrally mounted for. turning movement, formed with a cylindrical portion extendg; belowthe'fbettoin endyof the casing and adapted to engage the opening, said'cyli'n- .drical portion being of a length to extend it V -below the opening and havinga screw-threaded region adjacent its lower end, cutting members pro- 'ectm'g from the surface of the [cylindrical portion at a locality above the'sc'zrwithfe'tded region, extending parallel with thea'x'is his ibo

'iis

of thecylin'drical portion and-hardened, and i a nutengageabIe with the screw-threaded end ofthe cylindrical portion, to be turned the combination of a door fixture, a jamb" against the horizontal part and adapted, on being turned thereagainst,to draw the vertical shaft downwardly through the opening and cause the hardened cutting members to penetrate the materialof the horizontal part, whereby securely to maintain the shaft locked to the bracket against turning move-' ment despite the rotative force exerted upon the shaft by the turning of. the casing thereon. V

2. In a door hinge of the kind described,

side of the horizontal part, cutting members projecting fromthe surfaceof the enlarged portion of the shaft, extending parallel with 1 the axis thereof and hardened, a nut engageable with said screw-threaded region, to be turned against the side of the horizontal part and adapted, when turned thereagainst, to draw the shaft axially in the opening and cause the cutting members to penetrate the material of the horizontal part around the cylindrical opening ofla'rger diameter and with the plain portion of the shaft guided in the cylindrical opening of smaller Cli? ameter.

In testimony, that I claim the foregoing as my invention, I have signed my name hereto.

GUSTAV BOMMER. 

